<template>
  <td class="table-cell" :class="[selected ? 'selected' : '', customClass]"
      :style="{width: widget.options.cellWidth + '!important' || '', height: widget.options.cellHeight + '!important' || ''}"
      :colspan="widget.options.colspan || 1" :rowspan="widget.options.rowspan || 1"
      @click.stop="selectWidget(widget)">
    <draggable :list="widget.widgetList" class="draggable-div" v-bind="{group:'dragGroup', ghostClass: 'ghost',animation: 200}"
               handle=".drag-handler" @end="(evt) => onTableDragEnd(evt, widget.widgetList)"
               @add="(evt) => onTableDragAdd(evt, widget.widgetList)"
               @update="onTableDragUpdate" :move="checkContainerMove">
      <transition-group name="fade" tag="div" class="form-widget-list">
        <template v-for="(subWidget, swIdx) in widget.widgetList">
          <template v-if="'container' === subWidget.category">
            <component :is="subWidget.type + '-widget'" :widget="subWidget" :designer="designer" :key="subWidget.id" :parent-list="widget.widgetList"
                              :index-of-parent-list="swIdx" :parent-widget="widget"></component>
          </template>
          <template v-else>
            <component :is="subWidget.type + '-widget'" :field="subWidget" :designer="designer" :key="subWidget.id" :parent-list="widget.widgetList"
                          :index-of-parent-list="swIdx" :parent-widget="widget" :design-state="true"></component>
          </template>
        </template>
      </transition-group>
    </draggable>

    <div class="table-cell-action" v-if="designer.selectedId === widget.id && widget.type === 'table-cell'">
      <i class="el-icon-back" :title="i18nt('designer.hint.selectParentWidget')"
         @click.stop="selectParentWidget()"></i>
      <el-dropdown trigger="click" @command="handleTableCellCommand" size="small">
        <i class="el-icon-menu" :title="i18nt('designer.hint.cellSetting')"></i>
        <el-dropdown-menu slot="dropdown">
          <el-dropdown-item command="insertLeftCol">{{i18nt('designer.setting.insertColumnToLeft')}}</el-dropdown-item>
          <el-dropdown-item command="insertRightCol">{{i18nt('designer.setting.insertColumnToRight')}}</el-dropdown-item>
          <el-dropdown-item command="insertAboveRow">{{i18nt('designer.setting.insertRowAbove')}}</el-dropdown-item>
          <el-dropdown-item command="insertBelowRow">{{i18nt('designer.setting.insertRowBelow')}}</el-dropdown-item>
          <el-dropdown-item command="mergeLeftCol" :disabled="mergeLeftColDisabled" divided>{{i18nt('designer.setting.mergeLeftColumn')}}</el-dropdown-item>
          <el-dropdown-item command="mergeRightCol" :disabled="mergeRightColDisabled">{{i18nt('designer.setting.mergeRightColumn')}}</el-dropdown-item>
          <el-dropdown-item command="mergeWholeRow" :disabled="mergeWholeRowDisabled">{{i18nt('designer.setting.mergeEntireRow')}}</el-dropdown-item>
          <el-dropdown-item command="mergeAboveRow" :disabled="mergeAboveRowDisabled" divided>{{i18nt('designer.setting.mergeRowAbove')}}</el-dropdown-item>
          <el-dropdown-item command="mergeBelowRow" :disabled="mergeBelowRowDisabled">{{i18nt('designer.setting.mergeRowBelow')}}</el-dropdown-item>
          <el-dropdown-item command="mergeWholeCol" :disabled="mergeWholeColDisabled">{{i18nt('designer.setting.mergeEntireColumn')}}</el-dropdown-item>
          <el-dropdown-item command="undoMergeRow" :disabled="undoMergeRowDisabled" divided>{{i18nt('designer.setting.undoMergeRow')}}</el-dropdown-item>
          <el-dropdown-item command="undoMergeCol" :disabled="undoMergeColDisabled">{{i18nt('designer.setting.undoMergeCol')}}</el-dropdown-item>
          <el-dropdown-item command="deleteWholeCol" :disabled="deleteWholeColDisabled" divided>{{i18nt('designer.setting.deleteEntireCol')}}</el-dropdown-item>
          <el-dropdown-item command="deleteWholeRow" :disabled="deleteWholeRowDisabled">{{i18nt('designer.setting.deleteEntireRow')}}</el-dropdown-item>
        </el-dropdown-menu>
      </el-dropdown>
    </div>

    <div class="table-cell-handler" v-if="designer.selectedId === widget.id && widget.type === 'table-cell'">
      <i>{{i18nt('designer.widgetLabel.' + widget.type)}}</i>
    </div>
  </td>
</template>

<script>
import Draggable from 'vuedraggable'
import i18n from '@/views/lowcode/utils/i18n'
import FieldComponents from '@/views/lowcode/components/form-designer/form-widget/field-widget/index'
import refMixinDesign from '@/views/lowcode/components/form-designer/refMixinDesign'

export default {
  name: 'TableCellWidget',
  componentName: 'TableCellWidget',
  mixins: [i18n, refMixinDesign],
  inject: ['refList'],
  components: {
    Draggable,
    ...FieldComponents
  },
  props: {
    widget: Object,
    parentWidget: Object,
    parentList: Array,

    rowIndex: Number,
    colIndex: Number,
    rowLength: Number,
    colLength: Number,
    colArray: Array,
    rowArray: Array,

    designer: Object
  },
  computed: {
    selected () {
      return this.widget.id === this.designer.selectedId
    },

    customClass () {
      return this.widget.options.customClass || ''
    },

    mergeLeftColDisabled () {
      return (this.colIndex <= 0) || (this.colArray[this.colIndex - 1].options.rowspan !== this.widget.options.rowspan)
    },

    mergeRightColDisabled () {
      let rightColIndex = this.colIndex + this.widget.options.colspan
      return (this.colIndex >= this.colLength - 1) || (rightColIndex > this.colLength - 1) ||
            (this.colArray[rightColIndex].options.rowspan !== this.widget.options.rowspan)
    },

    mergeWholeRowDisabled () {
      return (this.colLength <= 1) || (this.colLength === this.widget.options.colspan)
    },

    mergeAboveRowDisabled () {
      return (this.rowIndex <= 0) || (this.rowArray[this.rowIndex - 1].cols[this.colIndex].options.colspan !==
            this.widget.options.colspan)

      // return this.rowIndex <= 0
      // return (this.rowIndex <= 0) || (this.widget.options.colspan !== this.rowArray) //TODO
    },

    mergeBelowRowDisabled () {
      let belowRowIndex = this.rowIndex + this.widget.options.rowspan
      return (this.rowIndex >= this.rowLength - 1) || (belowRowIndex > this.rowLength - 1) ||
            (this.rowArray[belowRowIndex].cols[this.colIndex].options.colspan !== this.widget.options.colspan)
    },

    mergeWholeColDisabled () {
      return (this.rowLength <= 1) || (this.rowLength === this.widget.options.rowspan)
    },

    undoMergeColDisabled () {
      return this.widget.merged || (this.widget.options.colspan <= 1)
    },

    undoMergeRowDisabled () {
      return this.widget.merged || (this.widget.options.rowspan <= 1)
    },

    deleteWholeColDisabled () {
      // return this.colLength === 1
      return (this.colLength === 1) || (this.widget.options.colspan === this.colLength)
    },

    deleteWholeRowDisabled () {
      return (this.rowLength === 1) || (this.widget.options.rowspan === this.rowLength)
    }

  },
  watch: {
    //
  },
  created () {
    this.initRefList()
  },
  methods: {
    selectWidget (widget) {
      this.designer.setSelected(widget)
    },

    checkContainerMove (evt) {
      return this.designer.checkWidgetMove(evt)
    },

    onTableDragEnd (obj, subList) {
      //
    },

    onTableDragAdd (evt, subList) { // 重复代码，可合并
      const newIndex = evt.newIndex
      if (subList[newIndex]) {
        this.designer.setSelected(subList[newIndex])
      }

      this.designer.emitHistoryChange()
      this.designer.emitEvent('field-selected', this.widget)
    },

    onTableDragUpdate () {
      this.designer.emitHistoryChange()
    },

    selectParentWidget () {
      if (this.parentWidget) {
        this.designer.setSelected(this.parentWidget)
      } else {
        this.designer.clearSelected()
      }
    },

    handleTableCellCommand (command) {
      if (command === 'insertLeftCol') {
        this.insertLeftCol()
      } else if (command === 'insertRightCol') {
        this.insertRightCol()
      } else if (command === 'insertAboveRow') {
        this.insertAboveRow()
      } else if (command === 'insertBelowRow') {
        this.insertBelowRow()
      } else if (command === 'mergeLeftCol') {
        this.mergeLeftCol()
      } else if (command === 'mergeRightCol') {
        this.mergeRightCol()
      } else if (command === 'mergeWholeCol') {
        this.mergeWholeCol()
      } else if (command === 'mergeAboveRow') {
        this.mergeAboveRow()
      } else if (command === 'mergeBelowRow') {
        this.mergeBelowRow()
      } else if (command === 'mergeWholeRow') {
        this.mergeWholeRow()
      } else if (command === 'undoMergeCol') {
        this.undoMergeCol()
      } else if (command === 'undoMergeRow') {
        this.undoMergeRow()
      } else if (command === 'deleteWholeCol') {
        this.deleteWholeCol()
      } else if (command === 'deleteWholeRow') {
        this.deleteWholeRow()
      }
    },

    insertLeftCol () {
      this.designer.insertTableCol(this.parentWidget, this.colIndex, this.rowIndex, true)
    },

    insertRightCol () {
      this.designer.insertTableCol(this.parentWidget, this.colIndex, this.rowIndex, false)
    },

    insertAboveRow () {
      this.designer.insertTableRow(this.parentWidget, this.rowIndex, this.rowIndex, this.colIndex, true)
    },

    insertBelowRow () {
      this.designer.insertTableRow(this.parentWidget, this.rowIndex, this.rowIndex, this.colIndex, false)
    },

    mergeLeftCol () {
      // this.designer.mergeTableColumn(this.colArray, this.colIndex, true)
      this.designer.mergeTableCol(this.rowArray, this.colArray, this.rowIndex, this.colIndex, true, this.widget)
    },

    mergeRightCol () {
      // this.designer.mergeTableColumn(this.colArray, this.colIndex, false)
      this.designer.mergeTableCol(this.rowArray, this.colArray, this.rowIndex, this.colIndex, false, this.widget)
    },

    mergeWholeRow () {
      this.designer.mergeTableWholeRow(this.rowArray, this.colArray, this.rowIndex, this.colIndex)
    },

    mergeAboveRow () {
      this.designer.mergeTableRow(this.rowArray, this.rowIndex, this.colIndex, true, this.widget)
    },

    mergeBelowRow () {
      this.designer.mergeTableRow(this.rowArray, this.rowIndex, this.colIndex, false, this.widget)
    },

    mergeWholeCol () {
      this.designer.mergeTableWholeCol(this.rowArray, this.colArray, this.rowIndex, this.colIndex)
    },

    undoMergeCol () {
      this.designer.undoMergeTableCol(this.rowArray, this.rowIndex, this.colIndex,
        this.widget.options.colspan, this.widget.options.rowspan)
    },

    undoMergeRow () {
      this.designer.undoMergeTableRow(this.rowArray, this.rowIndex, this.colIndex,
        this.widget.options.colspan, this.widget.options.rowspan)
    },

    deleteWholeCol () {
      this.designer.deleteTableWholeCol(this.rowArray, this.colIndex)
    },

    deleteWholeRow () {
      this.designer.deleteTableWholeRow(this.rowArray, this.rowIndex)
    }

  }
}
</script>

<style lang="scss" scoped>
  .table-cell {
    //padding: 3px;
    border: 1px dashed #336699;
    display: table-cell;
    position: relative;

    .draggable-div {
      position: relative;
      height: 100%;
    }

    .form-widget-list {
      border: 1px dashed #336699;
      margin: 3px;

      //min-height: 36px;
      height: 100%;

      /*position: absolute;*/
      /*top: 0;*/
      /*right: 0;*/
      /*bottom: 0;*/
      /*left: 0;*/
    }

    .table-cell-action{
      position: absolute;
      //bottom: -30px;
      bottom: 0;
      right: -2px;
      height: 28px;
      line-height: 28px;
      background: $--color-primary;
      z-index: 999;

      i {
        font-size: 14px;
        color: #fff;
        margin: 0 5px;
        cursor: pointer;
      }
    }

    .table-cell-handler {
      position: absolute;
      top: -2px;
      //bottom: -24px;  /* 拖拽手柄位于组件下方，有时无法正常拖动，原因未明？？ */
      left: -2px;
      height: 22px;
      line-height: 22px;
      background: $--color-primary;
      z-index: 9;

      i {
        font-size: 14px;
        font-style: normal;
        color: #fff;
        margin: 4px;
        cursor: default;  //cursor: move;
      }
    }

  }

  .table-cell.selected {
    outline: 2px solid $--color-primary !important;
  }
</style>
